WO2021019820A1 - Lens driving device and camera module - Google Patents

Abstract

A lens driving device (101) is provided with: a spacer member (1); a cover member (4); a magnetic field generating member (5); and an upper leaf spring (16). The cover member (4) is formed from a nonmagnetic material and has a ceiling part (4B) and a peripheral wall part (4A) including a pair of mutually opposite side plate parts. The spacer member (1) is disposed with a portion contacting the ceiling part (4B) of the cover member (4), and the upper leaf spring (16) is secured thereto. The spacer member (1) includes a frame part (1C) that faces the ceiling part (4B) and a protruding part (1P) that protrudes downward (in the Z2 direction) from the frame part (1C) to face the peripheral wall part (4A). The magnetic field generating member (5) is shaped to extend in a direction perpendicular to the optical axis and is secured to the peripheral wall part (4A) while being interposed between the protruding part (1P) and the peripheral wall part (4A).

Description

Lens drive and camera module

The present disclosure relates to, for example, a lens driving device mounted on a portable device with a camera, and a camera module including the lens driving device.

Conventionally, a yoke including an outer cylinder portion, a lens holder (lens holding member), a coil arranged on the outer periphery of the lens holding member, and a flat plate shape attached to the inner wall surface of the outer cylinder portion so as to face the coil. A lens driving device including a permanent magnet is known (see Patent Document 1). At the time of assembly, this lens driving device attracts a flat plate-shaped permanent magnet to the inner wall surface of an outer cylinder portion made of a magnetic material.

Japanese Unexamined Patent Publication No. 2012-88432

The outer cylinder may be made of a non-magnetic material. The outer cylinder portion made of a non-magnetic material is adopted, for example, when a plurality of lens driving devices are arranged side by side. This is to prevent the outer cylinder portion formed of the magnetic material in one lens driving device and the permanent magnet in the other lens driving device from affecting each other.

However, when the outer cylinder portion of the above-mentioned permanent magnet is made of a non-magnetic material, magnetic force cannot be used, so that the permanent magnet cannot be attracted to the outer cylinder portion. Therefore, the above-mentioned configuration including the outer cylinder portion made of a non-magnetic material may be difficult to assemble.

Therefore, it is desired to provide a lens driving device capable of improving the assembleability when fixing the magnetic field generating member to the cover member made of a non-magnetic material.

The lens driving device according to the embodiment of the present invention includes a fixed side member including a cover member, a lens holding member located in the cover member and capable of holding the lens body, and a coil held by the lens holding member. , The magnetic field generating member facing the coil, the fixed side support portion fixed to the fixed side member, the movable side support portion fixed to the lens holding member, the fixed side support portion, and the movable side support portion. In a lens driving device having an elastic arm portion provided between the lens and a leaf spring that movably supports the lens holding member in the optical axis direction, the cover members face each other in a pair. It has an outer peripheral wall portion including a side plate portion of the lens and a ceiling portion, and is formed of a non-magnetic material. The fixed side member is arranged so as to partially abut the cover member of the leaf spring. The spacer member includes a spacer member to which the fixed side support portion is fixed, and the spacer member has a frame-shaped portion facing the ceiling portion and a projecting portion protruding downward from the frame-shaped portion and facing the side plate portion. The magnetic field generating member has a shape extending in a direction orthogonal to the optical axis direction, and the magnetic field generating member is fixed to the side plate portion in a state of being sandwiched between the protruding portion and the side plate portion. Has been done.

By the above means, a lens driving device capable of improving the assembleability when fixing the magnetic field generating member to the cover member made of a non-magnetic material is provided.

It is an exploded perspective view of the lens driving device. It is an upper perspective view of the lens driving device. It is a front view of the lens drive device. It is a top view of the lens driving device. It is a bottom view of the lens driving device. It is an upper perspective view of the lens driving device in the state where the cover member is omitted. It is an upper perspective view of the lens driving device in a state where a spacer member and a cover member are omitted. It is an upper perspective view of the lens holding member. It is an upper perspective view of the lens holding member to which a coil is attached. It is a lower perspective view of a lens holding member. It is a lower perspective view of the lens holding member to which a coil is attached. It is a top view of the lens holding member. It is a top view of the lens holding member to which a coil is attached. It is a bottom view of the lens holding member. It is a bottom view of the lens holding member to which a coil is attached. It is an enlarged perspective view of a part of a lens holding member. It is an enlarged perspective view of another part of a lens holding member. It is a bottom view of the lens driving device in the state where the metal member and the base member are removed. It is a bottom view of the lens driving device in which the metal member, the base member, the spacer member, the cover member, the upper leaf spring, and the lower leaf spring are removed. It is a top view of the upper leaf spring. It is a top view of the lower leaf spring. It is a bottom view of the connection structure of a lower leaf spring and a coil in a lens drive device. It is a side view of the connection structure of a lower leaf spring and a coil in a lens drive device. It is an exploded perspective view and the completed perspective view of the base member of a lens drive device. It is a perspective view of a cover member. It is a perspective view of a spacer member. It is a perspective view of the cover member in which the spacer member was fitted. It is a perspective view of the cover member in which the upper leaf spring is fitted. It is a perspective view of the cover member in which the 2nd upper magnet is fitted. It is a perspective view of the cover member in which the 2nd lower magnet is fitted. It is a perspective view of the protruding part in a spacer member. It is a perspective view of the protruding part in a spacer member. It is a side view of the 2nd protrusion of a spacer member. It is a side view of the 2nd protrusion and the upper leaf spring. It is a side view of the 2nd protrusion, the upper leaf spring, and the 2nd upper magnet. It is a side view of the 2nd protrusion, the upper leaf spring, the 2nd upper magnet, and the 2nd lower magnet. It is a bottom view of the upper assembly. It is an enlarged view of the main part of the bottom surface of the upper assembly.

Hereinafter, the lens driving device 101 according to the embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the lens driving device 101. FIG. 2A is an upward perspective view of the lens driving device 101, and FIG. 2B is a front view of the lens driving device 101 as viewed from the Y2 side. FIG. 3A is a top view of the lens driving device 101, and FIG. 3B is a bottom view of the lens driving device 101. FIG. 4A is an upward perspective view of the lens driving device 101 with the cover member 4 removed, and FIG. 4B is an upward perspective view of the lens driving device 101 with the spacer member 1 and the cover member 4 removed. Both FIGS. 4A and 4B correspond to FIG. 2A.

As shown in FIG. 1, the lens driving device 101 has a lens holding member 2 capable of holding a lens body (not shown) and a lens holding member 2 along an optical axis direction (for example, a Z-axis direction) with respect to the lens body. A drive mechanism MK that moves the lens, a leaf spring 6 that movably supports the lens holding member 2 in the optical axis direction, a fixed side member RG to which the leaf spring 6 is fixed, an external power supply, and a lens drive device 101. Includes a metal member 7 that provides an electrical connection between them. The lens body is, for example, a tubular lens barrel including at least one lens, and is configured such that its central axis is along the optical axis direction. The "optical axis direction" includes the direction of the optical axis JD with respect to the lens body and the direction parallel to the optical axis JD.

As shown in FIG. 1, the drive mechanism MK has two oval-shaped winding portions 13 (2) held on two of the four side surfaces of the lens holding member 2 having a substantially rectangular parallelepiped outer shape. A coil 3 having (see FIG. 5B) and a magnetic field generating member 5 arranged to face the coil 3 in the radial direction (direction perpendicular to the optical axis direction) are included.

The cover member 4 is an outer case in the shape of a rectangular box, and constitutes a part of the fixed side member RG. In the present embodiment, the cover member 4 is produced by subjecting a plate material made of a non-magnetic material such as austenitic stainless steel to punching and drawing.

Specifically, as shown in FIG. 1, the cover member 4 has a box-shaped outer shape that defines the storage portion 4s. The cover member 4 has a rectangular tubular outer peripheral wall portion 4A and a flat plate annular ceiling portion 4B provided so as to be continuous with the upper end (Z1 side end) of the outer peripheral wall portion 4A. An opening is formed in the ceiling portion 4B.

The outer peripheral wall portion 4A includes the first side plate portion 4A1 to the fourth side plate portion 4A4. The first side plate portion 4A1 and the second side plate portion 4A2 face each other to form a pair of side plate portions. Similarly, the third side plate portion 4A3 and the fourth side plate portion 4A4 face each other to form another pair of side plate portions. Further, in the present embodiment, each of the first side plate portion 4A1 and the second side plate portion 4A2 is perpendicular to each of the third side plate portion 4A3 and the fourth side plate portion 4A4.

The cover member 4 configured in this way accommodates the coil 3 and the magnetic field generating member 5 in the accommodating portion 4s, and is coupled to the base member 18 together with the base member 18 as shown in FIGS. 2A and 2B. Configure the housing.

The magnetic field generating member 5 constitutes a part of the drive mechanism MK. In the present embodiment, as shown in FIG. 1, the magnetic field generating member 5 is arranged so as to face the first magnetic field generating member 5A arranged to face the first side plate portion 4A1 and the second side plate portion 4A2. The second magnetic field generating member 5B is included.

The first magnetic field generating member 5A is composed of a combination of two bipolar magnets. In FIG. 1, the north pole of a bipolar magnet is represented by cross hatching, and the south pole is represented by diagonal hatching. The same applies to the other figures illustrating the magnetic field generating member 5. The combination of the two bipolar magnets has an advantage that the magnetic field can be suppressed from leaking to the outside of the cover member 4 as compared with one bipolar magnet or one quadrupole magnet polarized in the optical axis direction. However, the first magnetic field generating member 5A may be composed of one bipolar magnet or may be composed of one quadrupole magnet. The same applies to the second magnetic field generating member 5B.

Specifically, as shown in FIG. 1, the first magnetic field generating member 5A includes a first upper magnet 5AU and a first lower magnet 5AL. Further, the second magnetic field generating member 5B includes a second upper magnet 5BU and a second lower magnet 5BL.

The first upper magnet 5AU, the first lower magnet 5AL, the second upper magnet 5BU, and the second lower magnet 5BL all have a substantially rectangular parallelepiped shape. The magnetic field generating member 5 is located outside the coil 3 (winding portion 13) and is arranged along two surfaces of the outer peripheral wall portion 4A of the cover member 4. Further, the magnetic field generating member 5 is fixed to the inner surface of the outer peripheral wall portion 4A by an adhesive. The first upper magnet 5AU, the first lower magnet 5AL, the second upper magnet 5BU, and the second lower magnet 5BL may be plate-shaped or rod-shaped.

The leaf spring 6 is an upper leaf spring 16 arranged between the lens holding member 2 and the cover member 4 (spacer member 1), and a lower leaf spring 26 arranged between the lens holding member 2 and the base member 18. And include. The lower leaf spring 26 includes a lower leaf spring 26A and a lower leaf spring 26B.

The fixed side member RG includes a spacer member 1, a cover member 4, and a base member 18 in which a metal member 7 is embedded.

The spacer member 1 is arranged so as to prevent the lens holding member 2 and the cover member 4 from colliding with each other when the lens holding member 2 moves in the Z1 direction.

The lens driving device 101 has a substantially rectangular parallelepiped shape and is mounted on a substrate (not shown) on which an image sensor (not shown) is mounted. The substrate, the lens driving device 101, the lens body mounted on the lens holding member 2, and the image pickup element mounted on the substrate so as to face the lens body constitute a camera module. The coil 3 is connected to an external power source via the lower leaf spring 26, the metal member 7, and the substrate. When a current flows through the coil 3 from an external power source, the drive mechanism MK generates an electromagnetic force along the optical axis direction.

The lens driving device 101 realizes an automatic focus adjustment function by using this electromagnetic force to move the lens holding member 2 along the optical axis direction on the Z1 side (subject side) of the image sensor. Specifically, the lens driving device 101 moves the lens holding member 2 in the direction away from the image sensor to enable macro photography, and moves the lens holding member 2 in the direction closer to the image sensor to enable infinity photography. I have to.

Next, the lens holding member 2 and the drive mechanism MK will be described. FIG. 5A is an upward perspective view of the lens holding member 2, and FIG. 5B shows a state in which the coil 3 is wound around the lens holding member 2 of FIG. 5A. FIG. 6A is a downward perspective view of the lens holding member 2, and FIG. 6B shows a state in which the coil 3 is wound around the lens holding member 2 of FIG. 6A. FIG. 7A is a top view of the lens holding member 2, and FIG. 7B shows a state in which the coil 3 is wound around the lens holding member 2 of FIG. 7A. FIG. 8A is a bottom view of the lens holding member 2, and FIG. 8B shows a state in which the coil 3 is wound around the lens holding member 2 shown in FIG. 8A. 9A is an enlarged perspective view of the portion P shown in FIG. 8B, and FIG. 9B is an enlarged perspective view of the portion Q shown in FIG. 8B. FIG. 10A is a bottom view of the lens driving device 101 in a state where the metal member 7 and the base member 18 are not shown, and FIG. 10B further shows a spacer member 1, a cover member 4, an upper leaf spring 16, and a lower portion. It is a bottom view of the lens driving device 101 in a state where the side leaf spring 26 is not shown.

In the present embodiment, the lens holding member 2 is manufactured by injection molding a synthetic resin such as a liquid crystal polymer (LCP). Specifically, as shown in FIG. 5A, the lens holding member 2 includes a tubular portion 12 having a through hole extending along the optical axis direction.

The tubular portion 12 is provided with a thread groove on the inner peripheral surface of the cylinder so that the lens body can be mounted. Further, the tubular portion 12 is provided with a pedestal portion 12d having four recesses 12dh on the end surface on the subject side. As shown in FIG. 4A, the inner portion 16i of the upper leaf spring 16 is placed on the pedestal portion 12d.

As shown in FIG. 5A, a winding protrusion 12p for holding the coil 3 is provided on the outer peripheral surface of the tubular portion 12. In the present embodiment, the winding protrusion 12p has a substantially rectangular parallelepiped shape protruding radially outward from the outer peripheral surface of the tubular portion 12 so that the coil 3 is wound around an axis perpendicular to the optical axis direction. Specifically, the winding protrusions 12p are arranged on two outer surfaces of the lens holding member 2 facing each other. In the present embodiment, the winding protrusions 12p are arranged on the outer surface on the Y1 side and the outer surface on the Y2 side.

As shown in FIG. 5B, the coil 3 is formed by winding a conductive wire rod around the winding protrusion 12p. Specifically, as shown in FIG. 6B, the coil 3 has a first coil 3A arranged so as to face the first side plate portion 4A1 and a second coil 3 arranged so as to face the second side plate portion 4A2. It includes a coil 3B and a connecting portion 3C that connects the first coil 3A and the second coil 3B. Then, as shown in FIGS. 7A and 7B, the winding protrusion 12p includes a first winding protrusion 12pA around which the first coil 3A is wound and a second winding protrusion 12pB around which the second coil 3B is wound. In the present embodiment, the coil 3 is fixed to the winding protrusion 12p without using an adhesive, but may be fixed to the winding protrusion 12p using an adhesive. The winding direction of the coil 3 is arbitrary, and is determined according to, for example, the arrangement (magnetization direction) of the magnetic field generating member 5.

The first coil 3A includes a winding portion 13 as a coil main body formed by being wound in an annular shape around the first winding protrusion 12pA, and the second coil 3B is annularly wound around the second winding protrusion 12pB. The winding portion 13 as a coil main body portion formed by winding is included. In FIG. 5B, for the sake of clarity, the detailed winding state of the conductive wire rod whose surface is covered with the insulating member is omitted for the winding portion 13. The same applies to the other drawings illustrating the winding portion 13.

As shown in FIG. 6A, the lens holding member 2 has two holding portions 72 as square convex protrusions protruding downward (Z2 direction) from the end surface on the image sensor side (Z2 side), and a round convex portion. Includes four projecting portions 2t in the shape.

As shown in FIG. 6B, the holding portion 72 includes a first holding portion 72A corresponding to the winding start side of the coil 3 and a second holding portion 72B corresponding to the winding end side of the coil 3. Both ends of the coil 3 are wound around the holding portion 72 and held.

As shown in FIGS. 6A and 10A, the projecting portion 2t includes two projecting portions 2t corresponding to the lower leaf spring 26A and two projecting portions 2t corresponding to the lower leaf spring 26B. An inner portion 26i as a movable side support portion of each of the lower leaf spring 26A and the lower leaf spring 26B is mounted and fixed to the projecting portion 2t. The fixing of the inner portion 26i of each of the lower leaf spring 26A and the lower leaf spring 26B is realized by heating the projecting portion 2t inserted into the through hole formed in the inner portion 26i. In the figure relating to this embodiment, the projecting portion 2t is shown in a state where the tip before being heated is not deformed. The projecting portion 2t may be cold crimped.

Next, the drive mechanism MK of the lens drive device 101 will be described. As shown in FIGS. 10A and 10B, the drive mechanism MK faces the coil 3 and the two side plate portions (first side plate portion 4A1 and second side plate portion 4A2) constituting the outer peripheral wall portion 4A of the cover member 4. It includes two magnetic field generating members 5 arranged in such a manner. Specifically, the magnetic field generating member 5 is a first magnetic field generating member 5A arranged so as to face the first side plate portion 4A1 and a second magnetic field generating member arranged so as to face the second side plate portion 4A2. 5B and. Then, the drive mechanism MK generates a driving force (thrust) by the current flowing through the coil 3 and the magnetic field generated by the magnetic field generating member 5, and moves the lens holding member 2 up and down along the optical axis direction.

As shown in FIG. 8B, the extending portion 33 of the coil 3 includes a first extending portion 33A connected to the first coil 3A on the winding start side of the coil 3 and a second coil 3B on the winding end side of the coil 3. Includes a second extending portion 33B connected to.

Specifically, as shown in FIG. 9A, the first extending portion 33A extends so as to face the winding portion 33m wound around the first holding portion 72A and the bottom surface (the surface on the Z2 side) of the lens holding member 2. It includes a first facing portion 33c and a second facing portion 33k extending facing the edge portion between the bottom surface and the rear surface (Y1 side surface) of the lens holding member 2. As shown in FIG. 9B, the second extending portion 33B has a winding portion 33m wound around the second holding portion 72B and a first facing portion 33c extending so as to face the bottom surface (Z2 side surface) of the lens holding member 2. And a second facing portion 33k extending facing the edge portion between the bottom surface and the front surface (the surface on the Y2 side) of the lens holding member 2.

In the present embodiment, the first extending portion 33A is wound around the first holding portion 72A of the lens holding member 2 before the wire rod of the coil 3 is wound around the outer circumference of the first winding protrusion 12pA. In the example shown in FIG. 9A, a part of the wire rod of the coil 3 is wound around the first holding portion 72A for 4 turns. As a result, the winding portion 33m is formed in the first holding portion 72A, and a part of the first extending portion 33A is held by the first holding portion 72A. However, the first extending portion 33A may be wound around the first holding portion 72A after the wire rod of the coil 3 is wound around the outer circumference of the first winding protrusion 12pA.

Next, the wire rod is wound around the outer circumference of the first winding protrusion 12pA. At that time, as shown in FIG. 9A, the wire rod extending from the winding portion 33 m extends so as to face the bottom surface of the lens holding member 2, and further, an edge portion between the bottom surface and the rear surface of the lens holding member 2. Extends to face. At this time, the portion facing the bottom surface of the lens holding member 2 constitutes the first facing portion 33c of the first extending portion 33A, and the portion facing the edge portion of the lens holding member 2 is the first extending portion 33A. 2 Opposing portions 33k are formed.

The second facing portion 33k of the first extending portion 33A is configured to be in contact with the edge portion of the lens holding member 2 as shown in FIG. 9A when extending toward the edge portion of the lens holding member 2. .. Therefore, when a strong impact is applied to the lens driving device 101 due to dropping or the like, the first extending portion 33A of the coil 3 is pressed against the edge portion of the lens holding member 2. In the present embodiment, the edge portion of the lens holding member 2 is configured to be curved. Therefore, the first extending portion 33A is difficult to be cut at the edge portion of the lens holding member 2. The same applies to the edge portion of the lens holding member 2 in contact with the second extending portion 33B.

After that, the connecting portion 3C is formed by the wire rod drawn from the winding portion 13 of the first coil 3A. Next, the wire rod is similarly wound around the outer circumference of the second winding protrusion 12pB. Then, when the winding of the wire rod around the outer circumference of the first winding protrusion 12pA and the winding of the wire rod around the outer circumference of the second winding protrusion 12pB are completed, the end portion of the winding portion 13 of the second coil 3B on the winding end side is reached. As shown in FIG. 9B, the second extending portion 33B to be connected is pulled out from the front side to the bottom side of the lens holding member 2. Specifically, the second facing portion 33k extends facing the edge portion between the bottom surface and the front surface of the lens holding member 2, and the first facing portion 33c extends facing the bottom surface of the lens holding member 2 and is wound. The portion 33m is wound around the second holding portion 72B of the lens holding member 2. In the example shown in FIG. 9B, the second extending portion 33B is wound around the second holding portion 72B for four turns.

Next, the details of the leaf spring 6 and the fixed side member RG will be described. FIG. 11A is a top view of the upper leaf spring 16, and FIG. 11B is a top view of the lower leaf spring 26. 12A and 12B are diagrams illustrating an example of a connection structure between the lower leaf spring 26A and the coil 3. Specifically, FIG. 12A is an enlarged view of the portion T shown in FIG. 10A, and FIG. 12B shows the lower leaf spring 26A, the coil 3, and the lens holding when the portion T shown in FIG. 10A is viewed from the Y2 side. It is an enlarged view of the member 2. In addition, in FIG. 12A and FIG. 12B, the conductive adhesive CA as a joining material is shown by cross-hatching for easy understanding. FIG. 13 is a diagram illustrating a base member 18 as a fixed side member RG. Specifically, FIG. 13 includes an exploded perspective view and a completed perspective view of the base member 18 in which the metal member 7 is embedded.

In the present embodiment, the leaf spring 6 is made of a metal plate whose main material is a copper alloy. The leaf spring 6 includes an upper leaf spring 16 arranged between the lens holding member 2 and the cover member 4 (spacer member 1), and a lower plate arranged between the lens holding member 2 and the base member 18. Includes spring 26. In the state where the lens holding member 2 and the leaf spring 6 (upper leaf spring 16, lower leaf spring 26A, and lower leaf spring 26B) are engaged with each other, in the leaf spring 6, the lens holding member 2 moves in the optical axis direction. The lens holding member 2 is supported in the air so as to be movable. The lower leaf spring 26A and the lower leaf spring 26B function as a feeding member for supplying an electric current to the coil 3. Therefore, the lower leaf spring 26A is electrically connected to one end of the coil 3, and the lower leaf spring 26B is electrically connected to the other end of the coil 3. A spacer member 1 is arranged between the upper leaf spring 16 and the cover member 4.

As shown in FIG. 11A, the upper leaf spring 16 has a substantially rectangular shape and is fixed to the inner portion 16i as the movable side support portion fixed to the lens holding member 2 and the spacer member 1 as the fixed side member RG. Includes an outer portion 16e as a fixed-side support and four elastic arm portions 16g located between the inner portion 16i and the outer portion 16e. Specifically, the inner portion 16i is provided so as to face the pedestal portion 12d (see FIG. 5A) of the lens holding member 2. The outer portion 16e has four corner portions 16b and four crosspieces 16r connecting two adjacent corner portions 16b. As shown in FIGS. 4A and 4B, two of the four crosspieces 16r are sandwiched between the spacer member 1 and the magnetic field generating member 5 and fixed with an adhesive. The corner portion 16b is fixed to the corner portion of the spacer member 1 with an adhesive. The spacer member 1, the cover member 4, and the magnetic field generating member 5 function as the fixed side member RG.

Specifically, when the upper leaf spring 16 is incorporated in the lens driving device 101, the inner portion 16i is mounted on the pedestal portion 12d (see FIG. 5A) of the lens holding member 2 as shown in FIG. 4A. Placed. Then, by fixing the inner portion 16i and the pedestal portion 12d with an adhesive, the inner portion 16i is fixed to the lens holding member 2. As shown in FIG. 4B, the outer portion 16e is in contact with the upper surface (the surface on the Z1 side) of the magnetic field generating member 5, and is sandwiched and fixed between the spacer member 1 (see FIG. 4A) and the magnetic field generating member 5. To.

As shown in FIG. 11A, the upper leaf spring 16 has a shape substantially rotationally symmetric with respect to the optical axis JD four times. The upper leaf spring 16 is fixed to the lens holding member 2 at the inner portion 16i, and is fixed to the cover member 4 via the spacer member 1 at the outer portion 16e. Therefore, the upper leaf spring 16 can support the lens holding member 2 in the air in a well-balanced manner.

As shown in FIG. 11B, the lower leaf spring 26A and the lower leaf spring 26B are configured so that their inner shapes are substantially semicircular. Each of the lower leaf spring 26A and the lower leaf spring 26B has an inner portion 26i as a movable side support portion fixed to the lens holding member 2 and a fixed side support fixed to the base member 18 as the fixed side member RG. It includes an outer portion 26e as a portion and an elastic arm portion 26g located between the inner portion 26i and the outer portion 26e.

As shown in FIG. 11B, each inner portion 26i of the lower leaf spring 26A and the lower leaf spring 26B connects the two inner joint portions 26c engaged with the lens holding member 2 and the two inner joint portions 26c. 1 The connecting portion 26p and the connecting plate portion 26h facing the extending portion 33 of the coil 3 are included.

When the lower leaf spring 26A and the lower leaf spring 26B are incorporated into the lens driving device 101, each of the four projecting portions 2t of the lens holding member 2 shown in FIG. 6A has the lower leaf spring 26A and the lower leaf spring 26B shown in FIG. 11B. It is inserted and fitted into a circular through hole provided in each inner joint portion 26c of the lower leaf spring 26B. As a result, the inner portions 26i of the lower leaf spring 26A and the lower leaf spring 26B are positioned and fixed to the lens holding member 2. The lower leaf spring 26A and the lower leaf spring 26B are fixed to the lens holding member 2 by, for example, hot or cold caulking the protruding portion 2t of the lens holding member 2.

In the following, the relationship between the lower leaf spring 26A, the lens holding member 2 and the coil 3 will be mainly described. However, the description regarding the lower leaf spring 26A also applies to the lower leaf spring 26B.

As shown in FIGS. 12A and 12B, the connecting plate portion 26h of the inner portion 26i of the lower leaf spring 26A faces the jetty portion 82 of the lens holding member 2 when the lens driving device 101 is assembled. That is, as shown in FIG. 12A, the surface of the connecting plate portion 26h on the subject side (Z1 side) faces the accommodating portion 82s formed by the jetty portion 82. Then, as shown in FIG. 12A, the first facing portion 33c of the second extending portion 33B of the coil 3 is the surface of the inner portion 26i (connecting plate portion 26h) of the lower leaf spring 26A on the subject side (Z1 side). It extends through the surface of the lens holding member 2 on the image sensor side (Z2 side).

As shown in FIG. 9B, the jetty portion 82 includes an inner side wall portion 82u located on the center side of the lens holding member 2, an outer wall portion 82v located on the outer side facing the inner side wall portion 82u, and a second holding portion. The side wall portion 82w located between the inner side wall portion 82u and the outer wall portion 82v on the side close to 72B is included. As shown in FIG. 9B, an open portion 82z having a notched wall portion is formed on the side of the jetty portion 82 far from the second holding portion 72B. The space surrounded by the three wall portions (inner side wall portion 82u, outer wall portion 82v, side wall portion 82w) forms the accommodating portion 82s. The accommodating portion 82s is configured to accommodate the conductive adhesive CA that connects the second extending portion 33B of the coil 3 and the lower leaf spring 26A. In the present embodiment, since the jetty portion 82 is formed at a position adjacent to the second holding portion 72B, the side wall of the second holding portion 72B is suitably used as the side wall portion 82w of the jetty portion 82. Therefore, the accommodating portion 82s is provided at a position adjacent to the second holding portion 72B.

When the lower leaf spring 26A is assembled to the lens holding member 2, the tip of the second holding portion 72B is the image sensor side (Z2 side) of the inner portion 26i of the lower leaf spring 26A, as shown in FIG. 12B. It protrudes downward (Z2 direction) from the inner portion 26i so as to be located at. A part of the winding portion 33m is also wound around the second holding portion 72B so as to be located on the image sensor side (Z2 side) of the inner portion 26i.

The lower leaf spring 26A and the second extending portion 33B of the coil 3 are electrically and physically connected by a conductive adhesive CA in which a conductive filler such as silver particles is dispersed in a synthetic resin. Specifically, before incorporating the lower leaf spring 26A into the lens holding member 2, the accommodating portion 82s surrounded by the jetty portion 82 of the lens holding member 2 is filled with the conductive adhesive CA, and then the lower leaf spring 26A Is attached to the lens holding member 2. Then, the projecting portion 2t of the lens holding member 2 is heated and the conductive adhesive CA is thermoset. From filling the accommodating portion 82s of the conductive adhesive CA to thermosetting the conductive adhesive CA, the lens holding member 2 is turned upside down so that the second holding portion 72B protrudes vertically upward. .. Therefore, the conductive adhesive CA can be appropriately held at a desired position (position within the accommodating portion 82s) even when it has fluidity. Since a part of the first facing portion 33c is arranged in the accommodating portion 82s, it is embedded in the conductive adhesive CA. The conductive adhesive CA is not limited to a thermosetting type, but may be an ultraviolet curable type or a moisture curable type.

As shown in FIG. 11B, the outer portion 26e of the lower leaf spring 26A includes two outer joint portions 26d engaged with the base member 18 and a second connecting portion 26q connecting the two outer joint portions 26d. The through hole provided in the outer joint portion 26d of the lower leaf spring 26A fits into the protruding portion 18t (see FIG. 13) provided on the upper surface of the base member 18. As a result, the outer portion 26e of the lower leaf spring 26A is positioned and fixed to the base member 18.

As shown in FIG. 11B, the lower leaf spring 26A and the lower leaf spring 26B have a shape that is rotationally symmetric with respect to the optical axis JD. The lower leaf spring 26A is connected to the lens holding member 2 by two inner joint portions 26c, and is connected to the base member 18 by two outer joint portions 26d. The same applies to the lower leaf spring 26B. With this configuration, the lower leaf spring 26A and the lower leaf spring 26B can support the lens holding member 2 in the air in a well-balanced manner while being movable in the optical axis direction.

Next, the details of the fixed side member RG will be described. The fixed side member RG includes a spacer member 1, a cover member 4, and a magnetic field generating member 5 for fixing the upper leaf spring 16, and a base member 18 for fixing each of the lower leaf spring 26A and the lower leaf spring 26B.

The base member 18 is manufactured by injection molding using a synthetic resin such as a liquid crystal polymer. In the present embodiment, as shown in FIG. 13, the base member 18 is a member having a substantially rectangular plate-like outer shape, and a circular opening 18k is formed in the center. Further, on the surface (upper surface) of the base member 18 on the subject side (Z1 side), six projecting portions 18t protruding upward are provided. The projecting portion 18t is inserted and fitted into a through hole provided in the outer joint portion 26d of each of the lower leaf spring 26A and the lower leaf spring 26B. At this time, the projecting portion 18t is heat-caulked and fixed to the outer joint portion 26d. In the figure relating to this embodiment, the projecting portion 18t is shown in a state where the tip is deformed after being heated. The projecting portion 18t may be cold crimped and fixed to the outer joint portion 26d.

As shown in FIG. 13, a metal member 7 formed of a metal plate containing a material such as copper or iron or an alloy containing them as a main component is insert-molded and embedded in the base member 18.

The metal member 7 includes the first metal member 7A to the third metal member 7C. The first metal member 7A has a connection portion 7AC exposed from the upper surface (Z1 side surface) of the base member 18, and the second metal member 7B has a connection exposed from the upper surface (Z1 side surface) of the base member 18. It has a part 7BC. The surface of the connecting portion 7AC and the surface of the connecting portion 7BC are located on the same plane.

The connection portion 7AC faces the through hole 26dt (see FIG. 11B) formed in the outer joint portion 26d of the lower leaf spring 26A, and is connected to the outer joint portion 26d of the lower leaf spring 26A via the conductive joint material. Be connected. The conductive bonding material is, for example, solder or a conductive adhesive. In this embodiment, the conductive bonding material is a conductive adhesive.

Similarly, the connecting portion 7BC faces the through hole 26dt (see FIG. 11B) formed in the outer joining portion 26d of the lower leaf spring 26B, and the outer joining of the lower leaf spring 26B is joined via the conductive joining material. Connected to portion 26d.

The first metal member 7A has a terminal portion 7AT that projects downward from the bottom surface (Z2 side surface) of the base member 18, and the second metal member 7B is downward from the bottom surface (Z2 side surface) of the base member 18. It has a terminal portion 7BT protruding from the surface.

The third metal member 7C has end portions 7C1 to 7C4 protruding outward in a direction perpendicular to the optical axis direction from a corner portion of the base member 18. As shown in FIGS. 2A and 2B, each of the end portions 7C1 to 7C4 is configured to be in contact with the lower ends of the four corners of the cover member 4.

The base member 18 is positioned after the inner surface of the outer peripheral wall portion 4A of the cover member 4 and the outer peripheral side surface of the base member 18 are combined and positioned, and then the ends 7C1 to 7C4 and the lower ends of the four corners of the cover member 4 are formed. Is welded and fixed to the cover member 4. The cover member 4 and the base member 18 may be fixed at least partially with an adhesive.

Next, the superassembly UA of the lens driving device 101 will be described with reference to FIGS. 14A to 14C and FIGS. 15A to 15C. The upper assembly UA is mainly composed of a spacer member 1, a cover member 4, an upper leaf spring 16, and a magnetic field generating member 5. 14A to 14C and FIGS. 15A to 15C are diagrams illustrating an assembly procedure of the upper assembly UA. Specifically, FIG. 14A shows a perspective view of the cover member 4 in an upside down state, FIG. 14B shows a perspective view of the spacer member 1 in an upside down state, and FIG. 14C shows a perspective view of the spacer member 1. The perspective view of the cover member 4 in which is fitted is shown. FIG. 15A shows a perspective view of the cover member 4 further fitted with the upper leaf spring 16, FIG. 15B shows a perspective view of the cover member 4 further fitted with the second upper magnet 5BU, and FIG. 15C further shows a perspective view of the cover member 4 into which the second upper magnet 5BU is fitted. The perspective view of the cover member 4 in which the 2nd lower magnet 5BL was fitted is shown.

FIG. 15C shows the completed state of the upper assembly UA. The upper assembly UA is then assembled to the lower assembly. The lower assembly is mainly composed of a lens holding member 2, a coil 3, a lower leaf spring 26, and a base member 18. The lower assembly corresponds to a configuration in which the magnetic field generating member 5 and the upper leaf spring 16 are removed from the configuration shown in FIG. 4B.

Assembling the upper assembly UA of the lens driving device 101 is typically performed with the cover member 4 upside down, that is, with the inner (Z2 side) surface of the ceiling 4B up, as shown in FIG. 14A. It is done in a state facing. Then, the spacer member 1 is fitted inside the cover member 4 as shown in FIG. 14C in a state of being turned upside down as shown in FIG. 14B.

The spacer member 1 is a member configured so that the outer portion 16e, which is the fixed side support portion of the upper leaf spring 16, comes into contact with the spacer member 1, and has a frame-shaped portion 1C and a protruding portion 1P as shown in FIG. 14B. The frame-shaped portion 1C is a rectangular frame-shaped member configured to face the ceiling portion 4B of the cover member 4, and extends along each of the first side plate portions 4A1 to the fourth side plate portion 4A4 of the cover member 4. Includes the existing first extending portion 1C1 to fourth extending portion 1C4. The projecting portion 1P is a member configured to project downward (Z2 direction) from the frame-shaped portion 1C, that is, project in a direction away from the ceiling portion 4B, and the first projecting portions 1P1 to 4th projecting portions. Part 1P4 is included. The protrusion 1P is configured to face the inner wall surface of the outer peripheral wall portion 4A of the cover member 4 when the spacer member 1 is fitted inside the cover member 4.

Specifically, the spacer member 1 is placed inside the cover member 4 so that the upper surface (Z1 side surface) of the frame-shaped portion 1C and the lower surface (Z2 side surface) of the ceiling portion 4B of the cover member 4 are in contact with each other. Be placed. In the present embodiment, the frame-shaped portion 1C of the spacer member 1 is adhesively fixed to the ceiling portion 4B of the cover member 4 with an adhesive.

More specifically, the first protruding portion 1P1 and the second protruding portion 1P2 are configured to face the second side plate portion 4A2 as shown in FIG. 14C. The third protruding portion 1P3 and the fourth protruding portion 1P4 are also invisible in FIG. 14C, but are configured to face the first side plate portion 4A1.

After that, the upper leaf spring 16 is fitted inside the cover member 4 in an upside-down state as shown in FIG. 15A. Specifically, the upper leaf spring 16 is inside the cover member 4 so that the upper surface (Z1 side surface) of the crosspiece 16r and the lower surface (Z2 side surface) of the frame-shaped portion 1C of the spacer member 1 are in contact with each other. Is placed in. In the present embodiment, the outer portion 16e of the upper leaf spring 16 is adhesively fixed to the frame-shaped portion 1C by an adhesive.

After that, the adhesive AD is applied to the inner walls of the first side plate portion 4A1 and the second side plate portion 4A2. Specifically, as shown in FIG. 15A, the inner wall of the second side plate portion 4A2 is coated with an adhesive AD for adhering and fixing the second magnetic field generating member 5B and the inner wall of the second side plate portion 4A2. .. Although invisible in FIG. 15A, the inner wall of the first side plate portion 4A1 is also coated with an adhesive AD for adhering and fixing the first magnetic field generating member 5A and the inner wall of the first side plate portion 4A1.

In the present embodiment, the adhesive containing the adhesive AD is a thermosetting adhesive. However, the adhesive may be another adhesive such as a moisture-curable adhesive or an ultraviolet-curable adhesive.

After that, the second upper magnet 5BU of the second magnetic field generating member 5B is fitted inside the cover member 4 as shown in FIG. 15B. Specifically, the second upper magnet 5BU is fitted into the space between the inner wall of the second side plate portion 4A2 and each of the first protruding portion 1P1 and the second protruding portion 1P2. In the present embodiment, each of the first protruding portion 1P1 and the second protruding portion 1P2 can press the second upper magnet 5BU against the inner wall of the second side plate portion 4A2 when the second upper magnet 5BU is fitted. It is configured as follows. That is, each of the first protruding portion 1P1 and the second protruding portion 1P2 lightly fits the space separated by the first protruding portion 1P1, the second protruding portion 1P2, and the second side plate portion 4A2 and the second upper magnet 5BU. It is configured so that it can be combined. The same applies to the first upper magnet 5AU, which is invisible in FIG. 15B.

After that, the second lower magnet 5BL of the second magnetic field generating member 5B is fitted inside the cover member 4 as shown in FIG. 15C, similarly to the second upper magnet 5BU. Specifically, the second lower magnet 5BL is on the lower side (Z2 side) of the second upper magnet 5BU, with the inner wall of the second side plate portion 4A2, and the first protruding portion 1P1 and the second protruding portion 1P2, respectively. It is fitted in the space between. In the present embodiment, each of the first protruding portion 1P1 and the second protruding portion 1P2 presses the second lower magnet 5BL against the inner wall of the second side plate portion 4A2 when the second lower magnet 5BL is fitted. Is configured to allow That is, each of the first protruding portion 1P1 and the second protruding portion 1P2 lightens the space separated by the first protruding portion 1P1, the second protruding portion 1P2, and the second side plate portion 4A2, and the second lower magnet 5BL. It is configured so that it can be fitted. The same applies to the first lower magnet 5AL, which is invisible in FIG. 15C.

Next, with reference to FIGS. 16A and 16B, the details of the protruding portion 1P in the spacer member 1 will be described. 16A and 16B are perspective views of the protrusion 1P. Specifically, FIG. 16A is a perspective view of the second protrusion 1P2 when the second protrusion 1P2 is viewed from the X1 side, and FIG. 16B is a perspective view of the second protrusion 1P2 when the second protrusion 1P2 is viewed from the Y2 side. It is a perspective view of the 2nd protrusion 1P2. The following description of the second protruding portion 1P2 is similarly applied to each of the first protruding portion 1P1, the third protruding portion 1P3, and the fourth protruding portion 1P4.

As shown in FIGS. 16A and 16B, the second protruding portion 1P2 has a first portion F1 facing the inner (Y1 side) end surface of the second magnetic field generating member 5B (see FIG. 15C) and a second magnetic field generating member 5B. It has a second portion F2 facing an end surface on one end side (X2 side) of the member 5B. The second protruding portion 1P2 is formed so that the cross section parallel to the XY plane is substantially L-shaped.

Specifically, the first portion F1 is configured to have a parallel portion PS and a tapered portion TS. The parallel portion PS is located on the root side of the second protruding portion 1P2 with respect to the tapered portion TS, and is configured to be substantially parallel to the second side plate portion 4A2. The tapered portion TS is located closer to the tip end side of the second protruding portion 1P2 than the parallel portion PS, and the distance between the tapered portion TS and the second side plate portion 4A2 increases toward the tip end side of the second protruding portion 1P2. It is configured to be. With this configuration, the second magnetic field generating member 5B is stably held in a state of being in surface contact with each of the parallel portion PS and the second side plate portion 4A2.

The tapered portion TS facilitates fitting of the second magnetic field generating member 5B into the space between the parallel portion PS and the inner wall of the second side plate portion 4A2. In the present embodiment, the second portion F2 is also configured to have a tapered portion on the tip end side like the first portion F1. However, the tapered portion TS may be omitted.

The second portion F2 is configured to have a convex portion PR protruding toward the second magnetic field generating member 5B. In the present embodiment, the convex portion PR is configured to be located on the root side of the second protruding portion 1P2 and project toward the side end surface side of the second magnetic field generating member 5B. With this configuration, the convex portion PR is such that a gap for pouring the adhesive AD is formed between the side end surface of the second magnetic field generating member 5B and the second portion F2. That is, the convex portion PR can prevent the side end surface of the second magnetic field generating member 5B and the second portion F2 from being in close contact with each other and closing the gap for pouring the adhesive AD.

Next, with reference to FIGS. 17A to 17D, the positional relationship between the protrusion 1P and the magnetic field generating member 5 will be described. 17A to 17D are diagrams illustrating an assembly procedure of the upper assembly UA. Specifically, FIG. 17A is a side view of the second protruding portion 1P2 of the spacer member 1 fitted inside the cover member 4 (not shown) when the second protruding portion 1P2 is viewed from the Y2 side. FIG. 17B is a side view of each member when the second protruding portion 1P2 and the upper leaf spring 16 of the spacer member 1 fitted inside the cover member 4 (not shown) are viewed from the Y2 side. FIG. 17C is a side view of the second protruding portion 1P2 of the spacer member 1 fitted inside the cover member 4 (not shown), the upper leaf spring 16, and the second upper magnet 5BU when viewed from the Y2 side. Is. FIG. 17D shows the second protruding portion 1P2 of the spacer member 1 fitted inside the cover member 4 (not shown), the upper leaf spring 16, the second upper magnet 5BU, and the second lower magnet 5BL as viewed from the Y2 side. It is a side view of each member of the time.

In the present embodiment, as shown in FIG. 17C, the parallel portion PS is configured so that its tip is located on the lower side (Z2 side) by a distance D1 from the lower surface (Z2 side surface) of the second upper magnet 5BU. Has been done. That is, the parallel portion PS is configured to come into contact with a part of the inner end surface (Y1 side) of the second lower magnet 5BL arranged on the lower side (Z2 side) of the second upper magnet 5BU. In other words, the second protruding portion 1P2 is configured such that the boundary portion BD between the parallel portion PS and the tapered portion TS is located so as to face the second lower magnet 5BL. With this configuration, the second lower magnet 5BL is in a state in which a part thereof is sandwiched between the parallel portion PS in the second protruding portion 1P2 and the inner wall of the second side plate portion 4A2, similarly to the second upper magnet 5BU. It is fixed to the inner wall of the second side plate portion 4A2. That is, in the parallel portion PS of the first portion F1 constituting the second protruding portion 1P2, not only the second upper magnet 5BU but also the second lower magnet 5BL is parallel to the inner wall of the second side plate portion 4A2. Can be held in.

In the present embodiment, as shown in FIG. 17D, the tip of the second protruding portion 1P2 is located on the upper side (Z1 side) of the second lower magnet 5BL by a distance D2 from the lower surface (Z2 side surface). It is configured in. That is, the second protruding portion 1P2 is configured so that the length in the optical axis direction is shorter than the length of the second magnetic field generating member 5B. This is to save space. However, the second protruding portion 1P2 may be configured so that the length in the optical axis direction is equal to or longer than the length of the second magnetic field generating member 5B.

In the present embodiment, as shown in FIG. 17C, the convex portion PR is configured to protrude by the width W1 in the X1 direction from the surface of the second portion F2 on the X1 side. With this configuration, the width W2 between the end surface of the second magnetic field generating member 5B on the X2 side and the surface of the second portion F2 on the X1 side is the width W1 which is the protrusion amount of the convex portion PR as shown in FIG. 17D. That is all. Therefore, a sufficient gap for pouring the adhesive AD is secured between the second magnetic field generating member 5B and the second portion F2 of the second protruding portion 1P2. As a result, the adhesive AD can flow into the gap formed between the second magnetic field generating member 5B and the second portion F2, and secures the second magnetic field generating member 5B and the second protruding portion 1P2. Can be adhesively fixed to.

Next, the details of the superstructure UA will be described with reference to FIGS. 18A and 18B. 18A and 18B are bottom views of the upper assembly UA. Specifically, FIG. 18A is a bottom view of the entire upper assembly UA, and FIG. 18B is an enlarged view of a portion R shown in FIG. 18A.

As shown in FIG. 18A, the magnetic field generating member 5 is located between the second portions F2 of each of the pair of protrusions 1P. Specifically, the second magnetic field generating member 5B is located between the second portion F2 of the first protruding portion 1P1 and the second portion F2 of the second protruding portion 1P2. The first magnetic field generating member 5A is located between the second portion F2 of the third protruding portion 1P3 and the second portion F2 of the fourth protruding portion 1P4.

Then, as shown in FIG. 18B, the adhesive AD is arranged in the gap between one end of the magnetic field generating member 5 and the protruding portion 1P. Specifically, the adhesive AD is poured into the gap between the end surface of the second magnetic field generating member 5B on the X2 side and the surface of the second portion F2 constituting the second protruding portion 1P2 on the X1 side. As shown in FIG. 15A, the adhesive AD is also applied between the second magnetic field generating member 5B and the second side plate portion 4A2. With this configuration, the spacer member 1, the cover member 4, and the magnetic field generating member 5 are adhesively fixed by the adhesive AD and fixed so as not to be relatively movable with each other.

As described above, the lens driving device 101 according to the present embodiment includes a fixed side member RG including a cover member 4, a lens holding member 2 located inside the cover member 4 and capable of holding the lens body, and a lens holding member 2. A coil 3 held by the lens 3, a magnetic field generating member 5 facing the coil 3, and an upper leaf spring 16 that movably supports the lens holding member 2 in the optical axis direction are provided. The upper leaf spring 16 has an outer portion 16e as a fixed side support portion fixed to the fixed side member RG, an inner portion 16i as a movable side support portion fixed to the lens holding member 2, and an outer portion 16e and an inner portion. It has an elastic arm portion 16g provided between the 16i and the 16i. The cover member 4 has an outer peripheral wall portion 4A including a pair of side plate portions facing each other and a ceiling portion 4B, and is formed of a non-magnetic material. The fixed side member RG includes a spacer member 1 in which a part of the fixed side member RG is arranged in contact with the ceiling portion 4B of the cover member 4 and the outer portion 16e of the upper leaf spring 16 is fixed. The spacer member 1 has a frame-shaped portion 1C facing the ceiling portion 4B, and a protruding portion 1P protruding downward (Z2 direction) from the frame-shaped portion 1C and facing the side plate portion. The magnetic field generating member 5 has a shape extending in a direction orthogonal to the optical axis direction, and is fixed to the side plate portion in a state of being sandwiched between the protruding portion 1P and the side plate portion. With this configuration, the lens driving device 101 can improve the assembleability when the magnetic field generating member 5 is fixed to the cover member 4 made of a non-magnetic material. This is because even when the cover member 4 is made of a non-magnetic material, the magnetic field generating member 5 is held by the protruding portion 1P in a state of being sandwiched between the protruding portion 1P and the side plate portion. ..

The protrusion 1P preferably has a first portion F1 facing the inner surface of the magnetic field generating member 5 (a surface facing the optical axis JD) and a second portion F2 facing the side end surface of the magnetic field generating member 5. Have. The magnetic field generating member 5 is arranged so as to be located between the second portions F2 of the pair of protruding portions 1P. For example, as shown in FIGS. 16A and 16B, the second protruding portion 1P2 has a first portion F1 facing the inner (Y1 side) surface of the second magnetic field generating member 5B and a side end surface of the second magnetic field generating member 5B. It has a second portion F2 facing (the surface on the X2 side). Then, as shown in FIG. 18A, the second magnetic field generating member 5B is arranged so as to be located between the second portion F2 of the first protruding portion 1P1 and the second portion F2 of the second protruding portion 1P2. .. With this configuration, the first protruding portion 1P1 and the second protruding portion 1P2 can suppress the movement of the second magnetic field generating member 5B in the extending direction (X-axis direction). For example, in the first protruding portion 1P1 and the second protruding portion 1P2, the second magnetic field generating member 5B held parallel to the second side plate portion 4A2 moves in the X-axis direction when the upper assembly UA is assembled. Can be prevented.

The protrusion 1P is preferably formed in an L-shaped cross section. For example, as shown in FIGS. 16A and 16B, in the second protruding portion 1P2, the first portion F1 and the second portion F2 are integrally formed so that the cross section parallel to the XY plane is substantially L-shaped. ing. With this configuration, the protruding portion 1P having high rigidity including the first portion F1 and the second portion F2 is formed.

The magnetic field generating member 5 is preferably composed of a first magnet and a second magnet. The first magnet is arranged closer to the frame-shaped portion 1C than the second magnet, and the second magnet is arranged closer to the frame-shaped portion 1C than the first magnet. For example, as shown in FIG. 15C, the second magnetic field generating member 5B includes a second upper magnet 5BU as a first magnet arranged on a side (Z1 side) close to the frame-shaped portion 1C constituting the spacer member 1 and a frame. It is composed of a second lower magnet 5BL as a second magnet arranged on the side (Z2 side) far from the shape portion 1C. In this configuration, the coil 3 has an oval shape having a coil axis perpendicular to the optical axis direction, as shown in FIG. 5B, for example. Each of the first magnet and the second magnet has different magnetic poles on the inner surface facing the coil 3 and the outer surface facing the side plate portion. Further, the inner surface of the first magnet and the inner surface of the second magnet have different magnetic poles. For example, as shown in FIG. 1, in the first upper magnet 5AU as the first magnet, the inner surface facing the coil 3 is magnetized to the S pole, and the outer surface facing the first side plate portion 4A1 is magnetized to the N pole. ing. In the first lower magnet 5AL as the second magnet, the inner surface facing the coil 3 is magnetized to the N pole, and the outer surface facing the first side plate portion 4A1 is magnetized to the S pole. That is, the inner surface (S pole) of the first upper magnet 5AU as the first magnet and the inner surface (N pole) of the first lower magnet 5AL as the second magnet have different magnetic poles. Similarly, in the second upper magnet 5BU as the first magnet, the inner surface facing the coil 3 is magnetized to the S pole, and the outer surface facing the second side plate portion 4A2 is magnetized to the N pole. In the second lower magnet 5BL as the second magnet, the inner surface facing the coil 3 is magnetized to the N pole, and the outer surface facing the second side plate portion 4A2 is magnetized to the S pole. That is, the inner surface (S pole) of the second upper magnet 5BU as the first magnet and the inner surface (N pole) of the second lower magnet 5BL as the second magnet have different magnetic poles. The protruding portion 1P is configured so that the tip thereof is located closer to the second magnet than the boundary between the first magnet and the second magnet. For example, as shown in FIGS. 17C and 17D, the tip of the second protrusion 1P2 is closer to the boundary between the second upper magnet 5BU as the first magnet and the second lower magnet 5BL as the second magnet. , It is configured to be located on the side of the second lower magnet 5BL, that is, on the lower side (Z2 side). As described above, even when the magnetic field generating member 5 is composed of two magnets stacked in the optical axis direction, the spacer member 1 has the two magnets between the protruding portion 1P and the side plate portion. Can be pinched.

The first portion F1 of the protruding portion 1P is preferably located on the root side of the protruding portion 1P and substantially parallel to the side plate portion, and is located on the tip side of the protruding portion 1P with respect to the parallel portion PS. It has a tapered portion TS whose distance from the side plate portion increases toward the tip end side of 1P. The boundary portion BD between the parallel portion PS and the tapered portion TS is preferably configured to be positioned so as to face the second magnet. For example, as shown in FIGS. 16A and 16B, the first portion F1 of the second protruding portion 1P2 is located on the root side of the second protruding portion 1P2 with respect to the tapered portion TS and is a parallel portion substantially parallel to the second side plate portion 4A2. It has a PS and a tapered portion TS which is located closer to the tip end side of the second protruding portion 1P2 than the parallel portion PS and whose distance from the second side plate portion 4A2 increases toward the tip end side of the second protruding portion 1P2. Then, as shown in FIGS. 17C and 17D, the boundary portion BD between the parallel portion PS and the tapered portion TS is located so as to face the second lower magnet 5BL as the second magnet, that is, the boundary portion BD. Is configured to be located on the lower side (Z2 side) of the lower surface (Z2 side surface) of the second upper magnet 5BU as the first magnet by the distance D1. With this configuration, the magnetic field generating member 5 is guided by the tapered portion TS at the time of assembly, and is easily fitted into the space between the protruding portion 1P and the side plate portion of the outer peripheral wall portion 4A. Then, even after being fitted between the protruding portion 1P and the side plate portion, the magnetic field generating member 5 is supported by the parallel portion PS parallel to the side plate portion, and thus is held in a state parallel to the side plate portion. .. That is, the parallel portion PS can prevent the magnetic field generating member 5 from being slanted with respect to the side plate portion. Therefore, the first magnet and the second magnet constituting the magnetic field generating member 5 are arranged at a desired position between the protrusion 1P and the side plate portion in a desired posture. As a result, the lens driving device 101 can prevent the positional relationship between the coil 3 and the magnetic field generating member 5 from being displaced, and thus prevents the thrust for driving the lens holding member 2 from being dispersed. it can.

At the base of the second portion F2 of the protruding portion 1P, a convex portion PR that protrudes toward the magnetic field generating member 5 is preferably formed. Then, the adhesive AD is arranged between the second portion F2 on the lower side (Z2 side) of the convex portion PR and the magnetic field generating member 5. For example, as shown in FIG. 17D, a convex portion PR projecting toward the second magnetic field generating member 5B is formed at the base of the second portion F2 of the second protruding portion 1P2. An adhesive AD is arranged between the second portion F2 and the second magnetic field generating member 5B on the lower side (Z2 side) of the convex portion PR. With this configuration, a gap having at least a width W2 wider than the width W1 of the convex portion PR is formed between the second portion F2 of the second protruding portion 1P2 and the second magnetic field generating member 5B. Therefore, the adhesive AD can surely flow into the gap between the second portion F2 and the second magnetic field generating member 5B. As a result, the adhesive strength between the second protruding portion 1P2 and the second magnetic field generating member 5B is surely increased.

The preferred embodiment of the present invention has been described in detail above. However, the present invention is not limited to the above-described embodiments. Various modifications, substitutions, and the like can be applied to the above-described embodiments without departing from the scope of the present invention. In addition, each of the features described with reference to the above-described embodiments may be appropriately combined as long as there is no technical conflict.

For example, in the above embodiment, the coil 3 is a two oval coil having a coil axis perpendicular to the optical axis, which is held on each of two of the four side surfaces of the lens holding member 2. It is composed of. However, the present invention is not limited to this configuration. The coil 3 may be an annular coil wound around the lens holding member 2 so as to have a coil shaft extending in the optical axis direction. In this case, the magnetic field generating member 5 may be composed of four bipolar magnets arranged so as to face each of the four side plate portions constituting the outer peripheral wall portion 4A.

Further, in the above embodiment, the first magnetic field generating member 5A is composed of a combination of the first upper magnet 5AU and the first lower magnet 5AL magnetized in the direction perpendicular to the optical axis JD. It may be composed of one bipolar magnet magnetized along the optical axis direction. In this case, the magnetic pole of the upper portion of the bipolar magnet corresponds to the magnetic pole of the inner portion of the first upper magnet 5AU, and the magnetic pole of the lower portion thereof corresponds to the magnetic pole of the inner portion of the first lower magnet 5AL. The same applies to the second magnetic field generating member 5B.

Further, in the above embodiment, the magnetic field generating member 5 has a substantially rectangular parallelepiped shape and is arranged so as to face the side plate portion constituting the outer peripheral wall portion 4A, but the bottom surface has a trapezoidal prismatic shape and the outer peripheral wall. It may be arranged so as to face the four corners of the portion 4A.

Further, in the above embodiment, the protruding portion 1P in the spacer member 1 is configured to integrally include the first portion F1 and the second portion F2. However, the first portion F1 and the second portion F2 may be configured so as to extend from the frame-shaped portion 1C separately from each other and to be arranged at a distance from each other. In this case, the second part F2 may be omitted. That is, in the magnetic field generating member 5, one or a plurality of first portions F1 of the one or a plurality of first portions F1 and their side plate portions are subjected to a force of pressing the magnetic field generating member 5 against one of the side plate portions of the outer peripheral wall portion 4A. It may be held between one and the other. As described above, the number of the first portion F1 for holding one of the magnetic field generating members 5 may be one or three or more. When one magnetic field generating member 5 is held by one first portion F1, the first portion F1 is arranged so as to be in contact with the central portion of the magnetic field generating member 5 instead of the end portion of the magnetic field generating member 5. May be good.

This application claims priority based on Japanese Patent Application No. 2019-138267 filed on July 26, 2019, and the entire contents of this Japanese patent application are incorporated herein by reference.

1 ... Spacer member 1C ... Frame-shaped part 1C1 ... 1st extending part 1C2 ... 2nd extending part 1C3 ... 3rd extending part 1C4 ... 4th extending part 1P ... Protruding part 1st protruding part ... 1P1 2nd protruding part ... 1P2 3rd protruding part ... 1P3 4th protruding part ... 1P4 2 ... Lens holding member 2t ... Projection Part 3 ... Coil 3A ... 1st coil 3B ... 2nd coil 3C ... Connecting part 4 ... Cover member 4A ... Outer wall part 4A1 ... 1st side plate part 4A2 ...・ 2nd side plate part 4A3 ・ ・ ・ 3rd side plate part 4A4 ・ ・ ・ 4th side plate part 4B ・ ・ ・ Ceiling part 4s ・ ・ ・ Storage part 5 ・ ・ ・ Magnetic field generating member 5A ・ ・ ・ 1st magnetic field generating member 5AU ... 1st upper magnet 5AL ... 1st lower magnet 5B ... 2nd magnetic field generating member 5BU ... 2nd upper magnet 5BL ... 2nd lower magnet 6 ... Leaf spring 7.・ ・ Metal member 7A ・ ・ ・ 1st metal member 7AC ・ ・ ・ Connection part 7AT ・ ・ ・ Terminal part 7B ・ ・ ・ 2nd metal member 7BC ・ ・ ・ Connection part 7BT ・ ・ ・ Terminal part 7C ・ ・ ・ Third Metal members 7C1 to 7C4 ... End 12 ... Cylindrical part 12d ... Pedestal part 12dh ... Recess 12p ... Winding protrusion 12pA ... 1st winding protrusion 12pB ... 2nd winding protrusion 13 ... Winding part 16 ... Upper leaf spring 16b ... Corner part 16e ... Outer part 16g ... Elastic arm part 16i ... Inner part 16r ... Crosspiece 18 ... Base Member 18k ・ ・ ・ Opening 18t ・ ・ ・ Protruding part 26, 26A, 26B ・ ・ ・ Lower leaf spring 26c ・ ・ ・ Inner joint part 26d ・ ・ ・ Outer joint part 26e ・ ・ ・ Outer part 26g ・ ・ ・ Elastic arm Part 26h ... Connection plate part 26i ... Inner part 26p ... First connection part 26q ... Second connection part 33 ... Extension part 33A ... First extension part 33B ... 2nd extending part 33c ... 1st facing part 33k ... 2nd facing part 33m ... Winding part 72 ... Holding part 72A ... 1st holding part 72B ... 2nd holding part 82・ ・ ・ Jetty part 82s ・ ・ ・ Accommodation part 82u ・ ・ ・ Inner side wall part 82v ・ ・ ・ Outer wall part 82w ・ ・ ・ Side wall part 82z ・ ・ ・ Open part 101 ・ ・ ・ Lens drive device AD ・ ・ ・ Adhesive BD ... Boundary CA ... Conductive adhesive F1 ... 1st part F2 ... 2nd part JD ... Optical axis MK ... Drive Mechanism PR ... Convex part PS ... Parallel part RG ... Fixed side member TS ... Tapered part UA ... Upper assembly

Claims (8)

1. Fixed side members including cover members and
   A lens holding member that is located inside the cover member and can hold the lens body,
   The coil held by the lens holding member and
   A magnetic field generating member facing the coil and
   A fixed side support portion fixed to the fixed side member, a movable side support portion fixed to the lens holding member, and an elastic arm portion provided between the fixed side support portion and the movable side support portion. In a lens driving device including a leaf spring that movably supports the lens holding member in the optical axis direction.
   The cover member has an outer peripheral wall portion including a pair of side plate portions facing each other and a ceiling portion, and is formed of a non-magnetic material.
   The fixed-side member includes a spacer member in which a part of the fixed-side member is arranged in contact with the cover member and the fixed-side support portion of the leaf spring is fixed.
   The spacer member has a frame-shaped portion facing the ceiling portion and a protruding portion protruding downward from the frame-shaped portion and facing the side plate portion.
   The magnetic field generating member has a shape extending in a direction orthogonal to the optical axis direction, and the magnetic field generating member is fixed to the side plate portion in a state of being sandwiched between the protruding portion and the side plate portion. A lens driving device characterized by being
2. The protruding portion has a first portion facing the inner surface of the magnetic field generating member and a second portion facing the side end surface of the magnetic field generating member.
   The magnetic field generating member is arranged so as to be located between the second portions of each of the pair of protrusions.
   The lens driving device according to claim 1.
3. The protruding portion is formed in an L-shaped cross section.
   The lens driving device according to claim 2.
4. The magnetic field generating member is composed of a first magnet and a second magnet.
   The first magnet is arranged on the side close to the frame-shaped portion, and the second magnet is arranged on the side far from the frame-shaped portion.
   The coil has a shape having a coil axis perpendicular to the optical axis direction.
   Each of the first magnet and the second magnet has different magnetic poles on the inner surface facing the coil and the outer surface facing the side plate portion.
   The inner surface of the first magnet and the inner surface of the second magnet have different magnetic poles.
   The protruding portion is configured so that the tip is located closer to the second magnet than the boundary between the first magnet and the second magnet.
   The lens driving device according to claim 2 or 3.
5. The first part is
   A parallel portion located on the root side of the protruding portion and substantially parallel to the side plate portion,
   It has a tapered portion that is located closer to the tip end side of the protruding portion than the parallel portion and the distance from the side plate portion increases toward the tip end side of the protruding portion.
   The boundary portion between the parallel portion and the tapered portion is configured to be positioned so as to face the second magnet.
   The lens driving device according to claim 4.
6. At the base of the second portion, a convex portion protruding toward the magnetic field generating member is formed.
   An adhesive is arranged between the second portion on the lower side of the convex portion and the magnetic field generating member.
   The lens driving device according to any one of claims 2 to 5.
7. The magnetic field generating member has a substantially rectangular parallelepiped shape and is arranged so as to face the side plate portion.
   The lens driving device according to any one of claims 1 to 6.
8. The lens driving device according to any one of claims 1 to 7.
   With the lens body
   It has an image sensor that faces the lens body.
   The camera module.

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